Metallic pipe



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W. S. MAYO, OF NEW YORK, N. Y.

METALLIC PIPE.

Specicaton of Letters Patent No. 24,182, dated May 241859.

To all whom 'it may concern.'

Be it known that I, IV. S. MAYO, of the city, county, and State of New York, have invented a new and useful Improvement in Metallic Pipes; and I do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, and to the letters of reference marked thereon, of which- Figure l, represents a length of lead pipe p showing the formation of the pipe. Fig. 2, is a diametrical section through the same. Fig. 3, is a cross section.

The nature of my invention consists in placing around the outer surface of metallic pipes, longitudinal strips of metal at certain determined distances apart, and coiling around the pipe, thus prepared suitable sized wire or wires which may be wound in close contact or be separated, according to circumstances, the whole to be manufactured by proper machinery adapted to the purpose.

rlhe advantages derived in the employment of this pipe are numerous, for instance, the greatest advantage attained is strength combined with cheapness and durability, for it will be readily perceived that the thickness and weight of the pipe constructed as hereinafter described, can be greatly reduced while at the same time a degree of strength attained, sufficient to withstand an immense pressure, which would burst any ordinary pipe, the thickness of which mightV be much greater; besides in the manufacture of lead pipe, to which my invention is specially applicable, it is found to be very imperfect, flaws frequently occurring along its line, which defect is rendered harmless by the application of my principle, and in regard to the cheapness of my pipe it will be evident that by decreasing the weight of lead required to give the usual degree of strength to the common lead pipe, and add-A ing the same weight of a less costly metal, viz, wire, the cost of the pipe will be greatly reduced, and the cost of preparing my pipe will be nominal.

By reference to the accompanying drawings Fig. l, represents a lead pipe which is prepared in the following manner: The bore of the pipe after it comes from the molding machine is muchlarger, according to the diameter of the pipe, than would be insure the necessary strength and consequently the thickness of metal is much less.

This pipe may be then passed through suitable machinery and the longitudinal strips of metal B, laid on its surface, say twelve, or more or less, to an inch pipe as may be found necessary, and increasing the number as the diameter of the pipe increases; these strips B, perform an important function and are considered indispensable to the perfection of my improvement for preventing the elongation of the pipe and necessarily the contraction of its diameter when a great outward pressure is vexerted by the water on the inside of the pipe, the effect of which is to expand the pipe laterally and to destroy the cohesive properties of the metal. This I effectually prevent by coiling around the pipe and over the longitudinal strips B, suitable sized wire C, which is wound tight upon the pipe and in close contact, covering the entire surface of the pipe as shown by Fig. l. To facilitate the putting on of this wire it may be wound in three four or five strands as exhibited by the drawings. When the pipe is thus prepared the surface of the wire may be galvanized by simply passing it through a bath adapted to this purpose in order to give it a thin coating for preventing oxidation, and it is ready for the plumber. In order to prevent the unwinding of the wire when a pipe of this description is cut I solder the wires together at intervals along the line of pipe and, when the plumber wishes to cut a piece of pipe in order to make a joint he rst solders an inch or so on either side of the point of severing when the pipe is then cut at this point and the intermediate wires unwound to allow sulicient space for making a joint, and I might incidentally remark here, the union of my pipe can be more readily and neatly eifected than in the common method of joining pipe.

The destruction of lead pipes by rats is exceedingly annoying and expensive, and the pilfering of the pipe by persons who can readily cut it with a knife from vacant houses is all obviated by the exterior coverand consequent expense, is an additional result in this respect.

This pipe is capable of receiving any degree-of curvature and can be bent Without materially aectingthe Wire covering or the Strength thereof.

What I claim as my invention and desirev to secure by Letters Patent, is-

The application of longitudinal strips B; to the surface of a metallic pipe-in combination with the coiled Wire covering C, Whereby I am enabled to insure great strength l0 'with a less thickness of met-alsubstantially as hereinabove'specifled. l

W. S. MAYO. Witnesses:

LIVINGSTON, MICH. HUGHES. 

